Hi all,
I purchased a Monoprice Maker Select V2 printer about a month ago and have had a recurring issue that I cannot solve.
I am having an issue where the extruded filament strings from the print to the edge of the print area as the extruder moves. Below is a list of the things I have tried and relevant information
Issue: Using PLA Filament I have tried printing a round base for a model as well as a larger spool holder for my filaments, each time the initial print “circle” immediately starts stringing filament all over the print bed as the extruder moves.
Changed temperature settings in 5 degree increments from 160-200 C
Changed retraction settings (On/off) and tweaked an additional retraction setting from 0mm^3-10mm^3
consistently checked the print bed is aligned properly.
used a different print file
used different filament
Any advice anyone can give me is greatly appreciated… I am really stuck here and I have been working on this since late October.
Shaiss
2
Ok let’s start with temp should be 210. Retraction should be 2mm for distance and 40 mm/s for speed. What slicer are you using? Can you share screenshots of your settings? Also, try another pla. If you’re new you want to go with midrange like esun pla+ or other $25 filament. Once you get the hang after the first 2 spools then you can buy the cheap stuff 
What’s your layer fan set to?
Where was the filament purchased from? What is your bed temp? Are you using hairspray and printing direct to glass? What speed for extruder movement x/y?
Hey Shaiss,
I am using Cura as the slicer. I will try out the settings you suggested. Screen shot is attached.
I bought a Spool of Hatchbox White PLA filament. It was around $20, I swapped filaments because the first stuff I was using was the sample PLA that came with the printer.
Hatchbox Filament from Amazon.
My printer came with a bed “cover” i guess would be a way to describe it. it prints onto that and sticks with no issues.
Print speed is at 60mm/s and travel speed is at 120… Not sure if that answers your questions.
When I used the 210 temperature settings the filament melted and popped out of the top of the extruder. Picture is what the bed looked like.
Strings occurs for a few of reasons, including 1) high extruder temps, and 2) cooling. Where did you get your settings from?
Temperature variation in a room can also add to your problems. Welcome to the advanced class! 
Settings started out at 200 and I noticed it would run freely out at that temperature so I started decreasing it in increments. My issue is directly with the filament coming out of the extruder. The parts that are actually printing are fine, except the excess filament messes everything up.
I’d double check that bed alignment.
It’s possible your thermistor isn’t reading the correct temperatures and you may have to replace it, as I print at 220 without the “filament popping out of the top”. Enabling combing is also a way to fix stringing, but not in all cases.
I have wondered the same thing. But the printer is barely two months old so I would be very disappointed if it turned out the equipment was faulty. I think I am going to try a very low temp setting to see what it does.
I think the real trouble is with the thermistor and it is not able to get appropriate temperature readings. Plus, you should also double check the quality of the filament you are printing with.
either thermistor problem(replace cheaply) or liner tube(inside extruder) split, missing or genrally knackered, replace cheap. if none of these then I would suggest your fan Extruder, is not working as it should. Don’t have this model but expect extruder jacket( if it has one) to be also cooled by fan. What is happening is filament melting too soon in extruder tube and drive cannot push filament thro. you turn temp up and filament just dribbles through by gravity because temps to hot. if you look at your wipe post, it is formed but when table moves feed not there. I also expect you have been giving the filament a helping hand by trying to push it thro extruder. don’t. you will just make it worse. looks like you are heading for a complete gum up. strip down everthing now and clean with heat and pipecleaners before you play with any stting. last thing to try is to tweak the pots on your mainboard extruder fan conns. it could be power issue. not sure with your machine but if you open up controller and be careful to only touch fan pot you will be able to see if speed and power increases as you tweak. just to let you know a lot of extruder jacket casings are bullshit, they look inpressive with their massive fins but they don’t really do anything to aid cooling of the tube. I taske them off some machines and run the tube bare with a slightly increased angle on the fan. it would be nice to have water cooled jackets but you would have to pay a fortune for them. Good luck, and may your day be blessed with minimum fudgets. StevetheBuddistXXX
Maybe you can try a PID Tune: Extruder PID Tuning « 3d Printer Tips and Mods Wiki though I doubt it’ll help
